Alloy



' mechanical means.

Patented May 28, 1929.

UNITED STATES I 1,714,679 PATENT OFFICE.

DONALD C. LEE, 0F SYOKANE, WASHINGTON.

ALLOY.

I No Drawing.

My present invention relates to an improved alloy for use asanti-friction metal and adapted especially. for bearings of rotaryjournals as well as for slidingmachine-ele ments. The invention consistsin an alloy as an article of manufacture having asv its 'major portionor element, brass that is united with, Babbitt metal, lead, or pewter,as desired, by the use of a flux during the alloying process. In theproduction of the alloy in connection with brass as the major element ormetal, the brass is subjected to a milling process by means of which itis reduced to a finely comminuted grain or'coarse powder. The metal withwhich the brass is tobs'united is first reduced to a moltenstate andthenthe milled or powdered brass is added thereto, together with a flux foruniting the elements of the alloy into a homogeneous Whole.

Thus as an'exemplification of my invention in the uniting of brass andBabbitt metal, the Babbitt metal may form twenty per cent of the finalproduct or alloy.

, Thebrass which will form the remaining. eighty-tper centof theifinalproduct or alloy may be made'up of the following metals,

in copper 20 parts, zinc 3 parts and tin 3- parts. The proportion of thebrassand babbitt may be varied, and the ratio of metals in the brass andBabbitt metal may also vary.

The Babbitt metal is prepared in a crucible by the application of thenecessary heat in any usual manner, and brought to a molten state.

The brass is finely comininuted by suitable A flux is utilized foruniting these prepared ele ments during the alloying process. Oneformula for the flux or solu ion may comprise the following materials inthe proportions; stated Muriatic acid v p 1. gallon Zinc 3p0unds Bluevitriol (crystals) i 12 ounces Resin 21 ounces This flux is separatelyprepared by first placing the muriatic acid in a suitable con,-

tainer aiid adding thereto a supply of zinc strips as rapidly as may befor the dissolu-.,

tion of the zinc by chemical action in the acid.

While the acid is attacking and dissolving the zinc strips a supply ofblue vitriol (crystals) is added to this mixture, which is stirred oragitated in usual manner to assist in the dissolution and the formationof a homogenpplication filed November 17, 1926. Serial No. 149,006.

sorb the zinc. At this stage the resin is added to the solution and theWhole mass is continuously stirred or agitated until the chemicalchanges cease in the solution. The top of the. solution is then skimmedoff to remove any scum and after cooling, the solution or flux v isready for addition to the metals which will form the alloy.

comminuted form is added to the molten Babbitt metal contained in thecrucible and the solution as above prepared is preferably atomized inproper devices and added simultaneously to the molten metal with thebrass shavings or powder. During the introduction of the brass and fluxto the molten Babbitt metal, the mass while heated to the re: quiredtemperature, is stirred and agitated by suitable means until theconstituent parts of brass, Babbitt metal and the solution or''' fluxare thoroughly united and form a molten mass. U The final product isthus composed of the various elements of Babbitt metal and of brass,alloyed together, in approximately the proportions of 80% brass and 20%Babbitt metal. The ratio of copper and zinc in the brass may be as threetotwo, and the propor- The brass as previously prepared and intions inthe Babbitt metal may betin 83%;

copper 9% and antimony 8%..

The proportion of the fluxused to the al-' loy and the ratio of parts ormetals in the brass and Babbitt metal may vary or differ with thedesired" degree of'hardness'of'the finished roduct or "alloy. If ajournal bearing is to e'formed, the united alloy as molten imetal may bepoured from the crucible di rectly into a mold forthe formation of thedesired bearing structure. Or the molten metal may be poured from thecrucible into desired shapes or castings-for subsequent use.

I'find that the brass, Babbitt metal and flux unite readily andperfectly, and the production ofanti friction metalis thus accomplishedat a comparatively inexpensive cost.

' The alloy is of such tenacity that'when mold-' ed in a journalbearing'for instance, it eliminates danger of cracking or breaking, andmsures durability not only for bearlngs for rotary journals, but alsofor machine elements having slidingfrictional contact. While the alloyproduces but slight friction to the movingvparts, it is ofsuflicienthardness to reduce abrasions and Wear to a minimum wlthoiit cutting orinjuring .the frictionally engaged tion, as in a ournal bearing.

Having thusfully described my invention,

What I claim as new and desire to secure byv Letters Patent is? j alloyof approximately 80% 1. Ananti-friction metal comprising an brassand 20%Babbitt metal. v 2. The'process of preparing an anti-friction-metalwhich consists in comminuting brass, reducing Babbitt metal to a moltenstate, adding the eomminuted brass to the molten Babbitt metahaddingaflux-solution,

maintaining the mixture ina molten, state and agitating it to formanniform alloy.

' 3. The process of'preparing an anti-frie-' tion metal which consistsin reducing Babbitt metal to a'mo'lten mass, adding comminuted brasstofthe' molten metal, atomizing. a fluxsolutlo'n to the mixture andstirrmg it to form an alloy, and cooling the final product.

4:. The process of preparing an anti-fricmolten Babbitt metal, adding aflux-solution eon'mrisingmuriatie acid, zine, blue vitriol and resin 111 suitable proportions,ma1nta1n ing the mixture in a molten state andagitat 11;; it to form a uniform alloy.

In testl onywhereof I aflix my'slgnature.

DONALD 0. LEE."

